公开(公告)号：US4229395A

公开(公告)日：1980-10-21

申请号：US918694

申请日：1978-06-23

申请人： Tadashi Nagumo ,  Akio Yasuike ,  Hiroshi Kataoka

发明人： Tadashi Nagumo ,  Akio Yasuike ,  Hiroshi Kataoka

IPC分类号： B29C44/10 ,  B29C45/04 ,  B29D27/00 ,  B29F1/06

CPC分类号： B29C44/105 ,  B29C45/0408 ,  B29K2705/00 ,  Y10S264/83

摘要： Molten synthetic resin material containing foaming agent in an amount of 0.05 to 5 percent by weight is injected into a pre-pressurized mold cavity in a mold which is closed by a relatively low clamping force having a coefficient in the range of 10 to 40, said coefficient being represented as a ratio of clamping force to maximum injection shot volume. The above injection step is carried out for at least 3 seconds. After the injection step has been initiated, the pre-pressurized mold is released to atmosphere during the injection step at the soonest. At least two molds may be used to be alternately charged with said material.

摘要翻译： 将含有0.05〜5重量％的发泡剂的熔融合成树脂材料注入模具中的预加压模腔中，该模具通过具有在10至40范围内的系数的相对较低的夹紧力封闭，所述 系数表示为夹紧力与最大喷射体积的比率。 上述注射步骤进行至少3秒钟。 在注射步骤开始之后，预压模具在注射步骤中最快释放到大气中。 可以使用至少两个模具来交替地填充所述材料。